code: def test_error(self):
      runtime = cupyx.get_runtime_info()
      assert "Error" not in str(runtime)
  
      with mock.patch(
          "cupy_backends.cuda.api.runtime.driverGetVersion",
          side_effect=_get_error_func(
              cupy.cuda.runtime.CUDARuntimeError, 0
          ),
      ):
          runtime = cupyx.get_runtime_info()
          assert "CUDARuntimeError" in str(runtime)
  
      with mock.patch(
          "cupy_backends.cuda.api.runtime.runtimeGetVersion",
          side_effect=_get_error_func(
              cupy.cuda.runtime.CUDARuntimeError, 0
          ),
      ):
          runtime = cupyx.get_runtime_info()
          assert "CUDARuntimeError" in str(runtime)
  
      with mock.patch(
          "cupy_backends.cuda.libs.cudnn.getVersion",
          side_effect=_get_error_func(cudnn.CuDNNError, 0),
      ):
          runtime = cupyx.get_runtime_info()
          assert "CuDNNError" in str(runtime)
  
file_path: cupy/tests/cupyx_tests/test_runtime.py
imports: import unittest
  from unittest import mock
  import cupy
  import cupyx
  from cupy.cuda import cudnn
label_desc: Use image node_id 2 for calling the TestRuntime obj's underlying member method code with example usage: obj.test_error() without return types